Converting an array of RGB bytes into an Image

Hello,
I have written a scanner intreface (SANE) in JNI, and it gives me an array of RGB bytes as output. There is no transparency (obviously). I'm sure there is a way to use MemoryImageSource to turn this raw array into a plain old Image, but I'm not finding how to do it. I've tried:
     ColorSpace rgbColorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB);
     ColorModel ccm = new ComponentColorModel(rgbColorSpace, new int[] { 8, 8, 8 }, false, false, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
     MemoryImageSource mis = new MemoryImageSource(width, height, ccm, imageBytes, 0, 0);
     Toolkit kit = Toolkit.getDefaultToolkit();
     Image image = kit.createImage(mis);but that doesn't work. Any ideas on this? Surely it is possible, but it seems like Java always wants an alpha channel, something which I don't have.
Thanks

In other words, if I dump the bytes to a file, I can get an image like this:
rawtoppm -rgb 424 585 foo.raw > foo.ppm
where the image is 424x585, and the image comes up nicely. Surely there is some way to do what rawtoppm is doing in Java?

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How can I convert an array with varying length into a cluster

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Hi,
I also tried to do this but without success. I think that's not possible.
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Thomas
Using LV8.0
Don't be afraid to rate a good answer...

How to save Byte Array of raw data into JPEG image.

Hello!
I have a image and I stored its data as byte array as
bimage = bitmap1.getRawData();
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the short way is this:
ImageIO.write(bimage, "jpeg", new File("image.jpg"));
Where you use the original Image object... but it has to be a java.awt.image.RenderedImage (which a java.awt.image.BufferedImage is). So this method would come in handy.
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How to turn a byte[] into an image?

My app downloads image data from a server, storing the data in a byte[] called imageDataByteArray.
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int w = imageWidth; //488
int h = imageHeight; //245
int imageOffset = 0;
int scan = w;
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I think the length of imageDataByteArray is a problem - it's length is only 21461, whereas the number of pixels in the image ( = imageWidth * imageHeight) is 119560.
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Hiya Rodney,
Yes, it's in jpg format. I've tried your code but the image does not display correctly.
To shed some more light, here's how I'm getting the image:
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How can I convert an array off byte into an Object ?

Hi folks...
I�m developing an application that comunicates a PDA and a computer via Wi-Fi. I�m using a DataStream ( Input and Output ) to receive / send information from / to the computer. Most off the data received from him is in the byte[] type...
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Rodrigo Kerkhoff

There are no ObjectOutputStream and ObjectInputStream classes in CLDC. You must know what you are writing to and reading from the DataStream. You should write the primitives like int, String to the DataOutputstream at one end and read those in exactly the same sequence at the outher end using readInt(), readUTF() methods.

How do I convert an array of BYTES (where each BYTE represents a bit) into a single Hex number?

I am reading a signal from a USB-8451. This signal is stored as an array where each element represents a bit in the signal, but is stored in the array as a byte. How do I convert this array into a single Hex number. I attatched what I have so far, there are a few extra things to help me see what ia going on. One code uses Queue and the other uses arrays, let me know if you can help.
Attachments:
845x_EEPROMarrays.vi ‏27 KB
845x_EEPROM.vi ‏26 KB

mkssnwbrd wrote:
... so we can't introduce any other forms of signals or power into the circuit other than what the circuit already has. Trithfully I don't really know how I2C devices work, but my mentor here says that we can't use an I2C method becuase it will introduce voltage into the circuit and may damage out TCON chip.
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As far as the conversion is concerned, you basically need loop through your array of "bits", taking 16 at time since you said you have 16-bit values. It's not clear from your code whether your eventual goal is to get a numeric value or a string. This does not appear to be a subVI, so a simply numeric indicator formatted to display in hex format should be quite adequate. The array you are generating is an array of rings, whose datatype is I32, but they will have values of 0 or 1. You can use the example just posted, or you can use the attached variation.
Attachments:
Bits to Hex 2.vi ‏17 KB

Is there an easier way to convert bytes into bit(boolean) arrays?

I am currently using this method to convert bytes into bit arrays:
/*convert byte to int such that it is between 0-255 this is the bytes[] array
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You can loop through and use a bitwise operator instead. Here is an example without the loop.
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// the 2^1 bit is onetc...
You should get something like 110 when you're done.
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How to convert bytes[] into File object

hi
how to convert byte array into File object
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Regards
srinu

rrrr007 wrote:
Hi,
How to convert bytes[] into multipage File object?? ]There's no such thing as a "multipage File object." You ought to re-read this thread closely, and read the [API docs for File|http://java.sun.com/javase/6/docs/api/java/io/File.html] to clear up your confusion about what a File object is.
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Byte into bit array?

I want to implement a little compression programm, and I have to convert the byte array, in which I read a file into a bit array, because I have to be able to change single bits in that array.
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2.How many bits does the class Byte contain?
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How to convert digital array data into analog signal

i want help to convert digital data array into analog signal

shubham62 wrote:
We are implimenting real time audio trans-receiver. We have converted input audio data(analog form) into digital data. At the receiver side we received digital data which is in the form of digital data array.But we are unable to recover back our original input data. So please help us to sort out the problem.
Still no useful information. How was the data converted to digital in the first place? What conversion parameters did you use? As was said, you just need to do the math backwards to get it back into the analog.
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Convert an array of strings into a single string

Hi
I am having trouble trying to figure out how to convert an array of strings into a single string.
I am taking serial data via serial read in a loop to improve data transfer. This means I am taking the data in chunks and these chunks are being dumped into an array. However I want to combine all elements in the array into a single string (should be easy but I can't seem to make it work).
In addition to this I would also like to then split the string by the comma separator so if any advice could be given on this it would be much appreciated.
Many Thanks
Ashley.

Well, you don't even need to create the intermediary string array, right? This does exactly the same as CCs attachment:
Back to your serial code:
Why don't you built the array at the loop boundary? Same result.
You could even built the string directly as shown here.
Message Edited by altenbach on 12-20-2005 09:39 AM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
autoindexing.png ‏5 KB
concatenate.png ‏5 KB
StringToU32Array.png ‏3 KB

How to convert an array of numbers into a time signal?

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Attachments:
sample_vi.vi ‏30 KB

Converting an array of bytes to an image

I think this is the right forum for my question.
This code comes from the J2ME side of my application. It reads in an int from my server, and if its over a certain length, I can tell its an image so i can decode it from an array of bytes back into an image, but it throws an IllegalArgument Exception on image = Image.createImage(b,0,length);
I've decoded the byte array before it gets sent and convereted it back into an image and that works, and ive run the debugger and the array is full of numbers on the J2ME side of the app, but the call to createImage, just keeps throwing this exception and i can't find an answer. If you need anymore code, I'll post it.
int l = in.readInt();
imageArray = new ImageItem[l];
for(int i = 0; i < imageArray.length; i++){
byte[] b = null;
int length = in.readInt();
System.out.println("length = " + length);
if(length < 10) {
imageArray[i] = null;
System.out.println("null image");
} else {
b = new byte[length];
in.readFully(b,0,length);
System.out.println("image not null");
Image image = Image.createImage(b,0,length);
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ImageItem imageItem = new ImageItem("null", image, 0, "null");
imageArray[i] = imageItem;
If anyone can tell me how to indent the code, i would appreciate it, it looks indented when i post it my side.
Message was edited by:
trisonetwo
Message was edited by:
trisonetwo

If it works before sending then check your code for sending the image.
Also you can compare the byte array before sending with the array which was received at the other end.
For indent and syntex highliting use [ c o d e ] and [ / c o d e ] tags (without spaces)
Ex:-
int l = in.readInt();
imageArray = new ImageItem[l];
for(int i = 0; i < imageArray.length; i++){
   byte[] b = null;
   int length = in.readInt();
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   if(length < 10) {
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}

How to convert byte into string

can any tell me how to convert byte into string
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package str;
import java.io.*;
public class Testfile {
public static void main(String rags[])
byte b[]=new byte[100];
try{
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file.read(b,0,50);
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System.out.println("Exception is:"+e);
System.out.println(b);
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Namrata.Kakkar wrote:
errors: count cannot be resolved and Unhandled exception type Unsupported Encoding Exception.
If i write an integer value instead of "count" then Unhandled exception type Unsupported Encoding Exception error is left.This is elementary. You need to go back to [http://java.sun.com/docs/books/tutorial/|http://java.sun.com/docs/books/tutorial/] .

How to convert bytes[] into multipage File object

Hi,
How to convert bytes[] into multipage File object??
I used the java.io.SequenceInputStream to concatenate two input streams (basically .pdf files) into a single input stream. I need to create a single multipage pdf file using this input stream.
Thanks for you help in advance..

Only text format allows you to concatenate two files together to get a longer files.
Most formats have a header and a footer and so you cannot simply add one to the other.
You need to use a PDF API which will allow you to build the new document (if one exists)

Converting an array of RGB bytes into an Image

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